import com.google.common.base.Preconditions;


public class Pot {

	private boolean empty;

	public Pot(boolean empty) {
		this.empty = empty;
	}

	public void fill() {
		Preconditions.checkState(empty);
		empty = false;
	}

	public void empty() {
		empty = true;
	}

	public boolean isEmpty() {
		return empty;
	}
}
